private RestChannelConsumer parseExistingDocPercolate(
      PercolateRequest percolateRequest, RestRequest restRequest, NodeClient client) {
    String index = restRequest.param("index");
    String type = restRequest.param("type");
    percolateRequest.indices(
        Strings.splitStringByCommaToArray(restRequest.param("percolate_index", index)));
    percolateRequest.documentType(restRequest.param("percolate_type", type));

    GetRequest getRequest = new GetRequest(index, type, restRequest.param("id"));
    getRequest.routing(restRequest.param("routing"));
    getRequest.preference(restRequest.param("preference"));
    getRequest.refresh(restRequest.paramAsBoolean("refresh", getRequest.refresh()));
    getRequest.realtime(restRequest.paramAsBoolean("realtime", getRequest.realtime()));
    getRequest.version(RestActions.parseVersion(restRequest));
    getRequest.versionType(
        VersionType.fromString(restRequest.param("version_type"), getRequest.versionType()));

    percolateRequest.getRequest(getRequest);
    percolateRequest.routing(restRequest.param("percolate_routing"));
    percolateRequest.preference(restRequest.param("percolate_preference"));
    percolateRequest.source(restRequest.contentOrSourceParam());

    percolateRequest.indicesOptions(
        IndicesOptions.fromRequest(restRequest, percolateRequest.indicesOptions()));
    return channel -> executePercolate(client, percolateRequest, channel);
  }
  private RestChannelConsumer parseDocPercolate(
      PercolateRequest percolateRequest, RestRequest restRequest, NodeClient client) {
    percolateRequest.indices(Strings.splitStringByCommaToArray(restRequest.param("index")));
    percolateRequest.documentType(restRequest.param("type"));
    percolateRequest.routing(restRequest.param("routing"));
    percolateRequest.preference(restRequest.param("preference"));
    percolateRequest.source(restRequest.contentOrSourceParam());

    percolateRequest.indicesOptions(
        IndicesOptions.fromRequest(restRequest, percolateRequest.indicesOptions()));
    return channel -> executePercolate(client, percolateRequest, channel);
  }